Chemistry track

Understanding how our systems work, in order to improve and extend.
Explore how our technology works on the lowest levels, and what that can teach us about optimal use. Tell us your analysis and profiling techniques, how implementation affects function, and what a kernel is made of. Example topics from the past include “PHP – Architecting and Profiling for performance” and “The Linux Kernel Development model.”

Sessions for this track

It may seem obvious to some, but the socialist imagery that Mozilla uses isn't accidental. Nor is the grounding of Activity Streams in socialist theory. What do these things have to do with open source an its future? A lot, and I'll paint a picture to tell you how it should play out.

Cassandra is an open source, highly scalable distributed database that brings together Dynamo's fully distributed design and Bigtable's ColumnFamily-based data model. In this talk we'll discuss the strategies Cassandra employs to provide an eventually consistent data model.

Creating a redundant yet scalable virtualization environment is often difficult and expensive. Ganeti is an open source project which offers many solutions to simplify a clustered virtual machine environment while enabling you to use low cost hardware. This session will walk through Ganeti covering its basic design goals/features, installation architecture, and production implementation.

The Drizzle Project is a fork of the MySQL 6.0 server. One of the many goals of Drizzle is to enable a large plugin ecosystem by improving, simplifying, and modernizing the application programming interfaces between the kernel and the modules providing services for Drizzle. This tutorial serves to showcase the new APIs for Drizzle's replication through a series of in-depth examples.

This session examines common application architectures in regards to threading and I/O handling. Various threading models are described and weighed, explaining the pros and cons of each. For I/O, topics such as the the c10k problem and buffering are discussed with solutions. A C++ framework is introduced as an example, but the concepts are applicable to other languages as well.

HipHop transforms PHP source code into highly optimised C++ and then compiles it using g++. It allows developers to continue writing complex logical directly with PHP but leverages the speed benefits of using C++. Currently, HipHop powers the majority of Facebook servers, making this more than just a theoretical exercise.
This session will cover how HipHop works, how to setup HipHop and the small changes that may be required to applications to allow it to work with both PHP and HipHop.

With millions of users signing on daily to access their favorite social media services – be it Twitter, Facebook or Digg – a developer’s worst fear is not having the backend support to house and provide access to such huge amounts of related data.
Industry efforts to architect next generation databases that can scale massively by pairing open source databases and content management technologies with cloud-computing are underway. The door is also “opening” to a whole new world of user benefits which will be made possible by access to data -- cross-cloud -- in non-proprietary databases and content management systems.

It's not enough to have a website. You need to have your website (and your business) be findable, and not drive normal people (eg, everyone but you and your web designer) nuts. And you need to make sure that Google has it right.
Here's how.

JavaScript is a unique and powerful language. Its ubiquity in the browser and its elegant concurrency model make JavaScript an ideal tool in a number of situations. Learn about the best ways to use and to understand this language from a full-time JavaScript professional.

Treating the internet and all its sources as a database, YQL seeks to allow developers to explore government, social, api and all other external data in a standardized way. Further allowing developers to manipulate this data and mash different sources together, YQL works to open up the web and all its sources.

USB 3.0 promises a 10x speedup and better power management than USB 2.0. But how do these devices actually work? Is there open source support for them? Come learn about these fast new devices that are finally hitting the market.

You've worked really hard on your software. It's stable and has lots of nice features and users love it. But your sysadmin hates it and complains about how hard it is to install, configure, and manage. What's up with that?

Proposals for this track

Is your application latency-sensitive? Deterministic? Real-Time? This talk will take a broad look at tools and techniques in Linux that can help. And answer the question of why Linus calls some of us "crazy".

Join us for a case study on using open source tools to build a platform for enterprise web applications with symfony. The focus of this session will be on how Yahoo! has built web applications that scale with open source tools.

You may know Java or C# ... but do you own it? Can you add new language features to suit your needs? Of course not ... but with Clojure, you can! Clojure is more than a powerful language, it's a powerful language toolkit.

Why do you have to relearn yet another API every time you want to really use someone's data source on the Web? It's time we moved beyond just consuming feeds -- we need full-function data access APIs! That's what the Open Data Protocol (OData) and the Google Data Protocol (GData) aim to do. Learn about these efforts, how they are used, and why you should adopt them for your next web API.

The rule of Emperor Mensuraton begat army upon army of data until it overran the Empire. The Sword of Statisticales was dispatched to reduce them summarily. Some were average, while others were mean, and one was a la mode. They plotted through lines, bars and pies until finally there emerged one number to rule them all.

Exploring social application development techniques using OpenSocial 0.9, we'll look at how to harness user data to customize an application experience for each user and monetize that experience. Going further, we'll explore the vast improvements coming in the future for OpenSocial.

We aim to inform you about the archive formats you use every day. We will include an in-depth look at the tar, ar, cpio, gzip, bzip2, and deb formats, as well as the internals of the Git object store. Armed with this information, we will show you a practical application: removing the redundancy between files in version control and distributions of source and binaries.

That LAN port on your server just got sexy with high speed 10 Gigabit Ethernet and storage protocols providing the building blocks for data center LAN/SAN protocol convergence. We'll explore the protocol stacks, code resources and the application of these technologies in virtualized data centers. We'll also talk about the "big iron" IT vendor’s application of I/O convergence and how you as an open source developer can contribute.

WebSockets is an exciting new technology that enables bidirectional communication between web applications and server-side processes. Google's Chrome browser already provides WebSockets and developers can expect to see the technology in other browsers in 2010. This presentation will cover the WebSocket protocol, JavaScript API, and server-side implementations.

SINNERS!! HEAR ME!! For too long have you lain contented and SLOTHFUL in the illusion that time is infinite! SOON the UNIX EPOCH will END and numbers will OVERFLOW their confines CLEANSING all in a flood the likes we have not seen since 1901!!! The SINS of your 32 BITS will chase your children and your children's children unless you REPENT NOW and cleanse your code of the 2038 BUG!!

A webpage typically will be as slow as the slowest request in the page. So if for a high traffic website like Yahoo! frontpage has lots of such possibly slow external apis, it could hold webserver processes and also effect user experience. Multiple Retry is a feature meant to optimize server resource utilization and efficiently use webserver processes/threads.

RDMS showed us the one true way to organize data, yet the NoSQL movement shows us how it fails. The faithful are confused and concerned. The heretics rally boldly in the streets with torches and pitchforks, yelling something about "doesn't scale," while the defenders of orthodoxy scream about the features and safeties these strange new gods lack, and do the apostates even realize it?
As the philosophical storm brews, DB admins and developers must make fateful decisions that will affect the rest of the code's life. Here they will glean the first glimpses of the knowledge they will need to make informed choices and be spared the wrath of the database gods.

The Wikipedia Usability Initiative is a project to transform the free encyclopedia into something that truly anyone can edit. I'll outline the progress made since 2008 and offer a sneak peek at the future of MediaWiki.